What is the duration of a cardiac cycle?

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(A) The cardiac cycle refers to the sequence of events that occur during one complete heartbeat. In a healthy human adult,the heart beats approximatel

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$0.8$ seconds

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(A) The cardiac cycle refers to the sequence of events that occur during one complete heartbeat. In a healthy human adult,the heart beats approximately $72$ times per minute. To calculate the duration of one cardiac cycle,we divide $60$ seconds by the heart rate ($72$ beats per minute). Duration = $60 / 72 = 0.833$ seconds,which is approximately $0.8$ seconds.

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